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eDH Procedure Code(s)
LAB481 Methotrexate Level
Collection Information
Samples drawn for methotrexate therapeutic drug monitoring are ideally drawn via peripheral venipuncture. When peripheral venipuncture is not possible refer to DH procedure ID 234 for guideance on appropriate collection site and steps to adequately flush the catheter/line. Subcutaneous ports (e.g. Mediports) should be avoided due to high risk of sample contamination.
https://dh.navexone.com/content/dotNet/documents/?docid=55170
Specimen Information
| Specimen Type | Specimen Source | Acceptable Containers | Minimum Test Volume (mL) | |
|---|---|---|---|---|
| Blood | Blood, Venous | Gold-R | 1.0 | |
Shipping and Handling
Processing Instructions: N/ATransport Temperature: Refrigerated
Transport Instructions: N/A
Specimen Stability Unprocessed
Unprocessed: 2 Hours
Specimen Stability Post Processing
Ambient: 3 Days
Refrigerate: 2 Weeks
Frozen: 2 Weeks
Test Components
| Component | LOINC Code |
|---|---|
| METHOTREXATE | 14836-1 |
Turnaround Time (TAT)
STAT 1 Hour
Routine 4 Hours
CPT Code(s)
LAB481 Methotrexate level: 80204
Performing Lab Section
Chemistry
Performing Lab(s)
Dartmouth Hitchcock Medical Center Laboratory (MHMH)